thanks @Philip Magnussen for the detailed review&feedback!
I can only agree with the points you made and these will be put on my todolist.

Good news: G) is actually an undocumented feature of ffplay and also of LUTastic - you can use your keyboard to control the video preview :) spacebar is play/pause and arrow keys scrub!
I have not been able to find the complete list of controls there, so I opted not to mention it, but obviously I should have! :-D

happy holidays!